I built my first Android app.
It is a Live Wallpaper designed for 2.2.
When I press and hold the screen, select Wallpapers
and then select L
More info about resolution can be found in this thread.
This section especially:
...The resolution used seems to be a lot larger than the launcher icon resolution, using 48 for medium or 72 for high gives a very blurred image on both the emulator and real devices, leading me to think there is some scaling going on...